Groovy Excercise11

ExamCalculationInterface.groovy
package calculatorFunctions
public interface ExamCalculationInterface {
def execute(examScores)
}
​

AverageScore.groovy
package calculatorFunctions
import ExamCalculationInterface;
class AverageScore implements ExamCalculationInterface {
@Override
def execute(examScores) {
  def total = 0
  for (int i = 0; i < examScores.size(); i++)
   {
    total += examScores[i]
   }
  total / examScores.size()
}
}

MinimumScore.groovy
​​package calculatorFunctions
class MinimumScore implements ExamCalculationInterface {
@Override
def execute(examScores) {
  def lowest = 100
  for (int i = 0; i<examScores.size(); i++)
  {
   if (examScores[i]< lowest)
   {lowest= examScores[i]}
  }
  lowest
}
}

ExamScores.groovy
package ui
class ExamScores {
def scores = [72,43,29,96,93,33,49,32,44,45,44,29,60,61,66,66,59] as Integer[]

def analyse(closure) {
  closure(scores)
}
def analyseWithPassmark(passmark, closure) 
{
  //do something here with passmark
  closure(scores)
}
}

Main.groovy

package ui
import calculatorFunctions.*;
class Main {
static main(args) {
  def examScores = new ExamScores()
  def firstScore = { scores ->
   scores[0]
  }
  
  def first = examScores.analyse(firstScore)
  println "The first score was $first"

  def averageScore = { scores ->
   def total = 0
   scores.each {total += it}
   total / scores.size()
  }
  
  def lowestScore = { scores ->
   def lowest = 100
   scores.each {
    if (it < lowest)
    {lowest= it}
   }
   lowest
  }
  
  def passed = { scores ->
   def result = 0
   scores.each {
    if (it > 50) {result++}
   }
   result
  }
  
  
  def average = examScores.analyse(averageScore)
  def lowest = examScores.analyse(lowestScore)
  def passedNumber = examScores.analyse(passed)

  println "The average score was $average"
  println "The lowerst score was $lowest"
  println "$passedNumber passed the exam"
  
  def numberOfCandidates = examScores.analyse {scores -> scores.size()}
  println "There were $numberOfCandidates candidates."
  
  def testPassMark = examScores.analyseWithPassmark (50) {scores -> scores.size()}
  
  (20..30).step(2) {println it}
}

}

The first score was 72

The average score was 54.1764705882

The lowerst score was 29

8 passed the exam

There were 17 candidates.

20

22

24

26

28

30

​